细梗香草总皂苷的抗肿瘤活性研究

目的评价细梗香草总皂苷(capilliposide,LC)的抗肿瘤活性以及免疫调节作用。方法建立3种人源肿瘤裸鼠移植模型,随机分组给药,测量瘤径计算相对肿瘤增殖率(T/C),称取瘤重计算抑瘤率(inhibitory rate,I)。采用HE染色进行肿瘤组织病理学检测,免疫组化方法观察血管内皮生长因子(vascular endothelial growth factor,VEGF)的表达,初步探测LC抗肿瘤的作用机制。C57BL/6小鼠接种RM-1瘤液,建立小鼠荷前列腺癌模型,检测血液学指标以及脾T淋巴细胞增殖情况和IL-2活性,初步评价细梗香草总皂苷对免疫系统的调节作用。结果 LC可剂量依赖性的抑制荷瘤裸鼠肿瘤的生长,与模型对照组相比差异均有显著性,抑瘤率最高达:58.77%(前列腺癌PC-3)、56.22%(胃癌BGC-823)和55.73%(卵巢癌SK-OV-3)。LC可上调荷瘤小鼠外周血中白细胞(WBC)和血红蛋白(HGB),可提高荷瘤小鼠脾T淋巴细胞增殖能力和IL-2活性。结论 LC具有较强的抗肿瘤活性,其抗肿瘤作用可能与增强免疫功能和抑制肿瘤血管新生有关。     

黄连花中两个新的三萜皂苷黄连花中两个新的三萜皂苷

目的对黄连花(Lysimachia davurica Ledeb.)全草的三萜皂苷成分进行分离和结构鉴定。方法通过大孔树脂纯化,硅胶和反相硅胶色谱分离正丁醇萃取物物中的三萜皂苷;利用多种波谱技术并结合酸水解方法鉴定其化学结构。结果分离鉴定了2个三萜皂苷,其结构分别为3β,16α,29-三羟基-13,28-环氧-齐墩果烷-3-O-β-D-吡喃葡糖基-(1→2)-β-D-吡喃葡糖酸甲酯苷(I),3β,16α,28-三羟基-齐墩果-12-烯-3-O-｛β-D-吡喃葡糖基(1→2)-β-D-吡喃葡糖醛酸｝-28-O-β-D-吡喃葡糖苷(II)。结论化合物I和II为新的三萜皂苷,分别命名为黄连花皂苷D和J。     

长梗绞股蓝中的四个新达玛烷型三萜皂苷

长梗绞股蓝(Gynostemma longipesC.Y.Wu)以达玛烷型三萜皂苷为主要活性成分.本文综合使用MCI柱色谱、硅胶柱色谱、制备型高效液相色谱等分离技术,从长梗绞股蓝中的大极性部位分离得到4个三萜皂苷类单体化合物,并主要利用MS和NMR等波谱学技术鉴定它们的结构为:(20S)-3β,20,21-三羟基达玛-...     

HPLC同时测定细梗香草中2个专属性黄酮苷的含量

目的 建立HPLC同时测定细梗香草中Quercetin-3-O-（2',6'-di-O-α-rhamnopyranosyl）-β-galactopyranoside和Kaempferol-3-O-[2-glucopyranosyl （1→3）rhamnopyranosyl-6-rhamnopyranosyl]-β-D-galactopyranoside含量的方法。方法 采用SHIMADZU Shim-pack VP-ODS C₁₈色谱柱（250 mm×4.6 mm,5 μm）,乙腈-0.3%磷酸溶液为流动相,线性梯度洗脱,流速为1 mL·min^-1;柱温为30℃,检测波长为350 nm。结果 Quercetin-3-O-（2',6'-di-O-α-rhamnopyranosyl）-β-galactopyranoside和Kaempferol-3-O-[2-glucopyranosyl（1→3）rhamnopyranosyl-6-rhamnopyranosyl]-β-D-galactopyranoside分别在0.041 46~2.072 8 μg·mL^-1（r=0.999 9）,0.088 95~4.447 5 μg·mL^-1（r=0.999 9）内呈良好的线性关系,平均加样回收率（n=6）分别为98.19%,98.85%;RSD分别为1.94%,1.81%。结论 建立的方法操作简单、专属性强,可用于同时测定细梗香草中2个专属黄酮苷类成分含量。     

加拿大产西洋参茎叶中的三个新三萜皂苷

从加拿大产西洋参的茎叶分离得到一种新达玛烷型三萜皂苷，利用理化性质和光谱数据，鉴定为３－Ｏ－１２－羟基达玛－２３，２５－二烯－２０－β－Ｄ－哟喃葡萄糖苷，命名为西洋参皂苷Ｌ１。     

辽东楤木芽中的两个新三萜皂苷

通过硅胶柱色谱和制备HPLC等方法从辽东楤木的芽中分离得到2个化合物,利用理化性质和光谱方法分别鉴定为3-O-[β-D-glucopyranosyl-(1→3)-α-L-arabinopyranosyl]caulophyllogenin(1)和3-O-[β-D-glucopyranosyl-(1→2)]-[β-D-glucopyranosyl-(1→3)]-β-D-glucopyranosyl echinocystic acid(2).2个化合物均为未见文献报道的新化合物,分别命名为congmuyanoside A和congmuyanoside B.     

细梗香草药材HPLC指纹图谱研究及质量评价

目的 通过HPLC建立细梗香草药材的指纹图谱,并对其进行聚类分析和主成分分析。方法 利用《中药色谱指纹图谱相似度评价系统》（2012版）对12批次细梗香草药材进行相似度评价,并采用SPSS 21.0软件对其进行聚类分析和主成分分析。结果 建立了细梗香草药材HPLC指纹图谱,确定了12个共有峰,指认了其中5个色谱峰;12批药材细梗香草相似度为0.949~0.997,表明它们之间的一致性较好。12批细梗香草可以聚为两大类,其中S7、S8聚为一类,其余聚为一类。经主成分分析,主成分1~3是影响细梗香草质量评价的主要因子,3个主成分累计方差贡献率为96.93%。结论 所建立的细梗香草的HPLC指纹图谱,以及聚类分析和主成分分析结果可为细梗香草药材的质量评价及进一步开发利用提供参考。     

九子参中一个新三萜皂苷

运用硅胶、SephadexLH-20、0DD以及高效液相色谱法,从九子参的根中分离得到一个新三萜皂苷和一个已知三萜皂苷。通过质谱以及一维二维核磁确定了化合物的结构。化合物1和2均为首次从该属植物中分离得到。     

西南忍冬花蕾中的两个新三萜皂苷

从西南忍冬花蕾（Ｌｏｎｉｃｅｒａ ｂｏｕｒｎｅｉ Ｈｅｍｓｌ）中分离得到两个 三萜皂苷,分别命名为西南忍冬皂苷Ａ、西南忍冬皂苷Ｂ。其结构是３－Ｏ－β－Ｄ－吡喃葡萄糖基－２３－羟基－羽扇豆烷－２０（２９）－烯－２８－酸－２８－Ｏ－β－Ｄ－吡喃葡萄糖酯、３－Ｏ－β－Ｄ－吡喃葡萄糖基－２３－羟基－羽扇豆烷－２０（２９）－烯－２８－酸－２８－Ｏ－〔β－Ｏ－吡喃葡萄糖基－（１→６）－β－Ｄ－吡喃葡萄糖〕酯。     

Two new triterpene saponins from Lysimachia capillipes

Two new saponins, capilliposide G (1) and capilliposide H (2), were isolated from the whole plants of Lysimachia capillipes. Their structures were determined by 1D and 2D NMR, MS technique and chemical methods.     

Two new triterpene saponins from Lysimachia capillipes

Two new saponins, capilliposide G (1) and capilliposide H (2), were isolated from the whole plants of Lysimachia capillipes. Their structures were determined by 1D and 2D NMR, MS technique and chemical methods.     

Two new triterpene saponins from Lysimachia davurica

Two new saponins, named davuricoside L (1) and davuricoside O (2), have been isolated from the whole plants of Lysimachia davurica. Their structures were determined by 1D and 2D NMR, FAB-MS techniques, and chemical methods.     

Two new triterpene saponins from Lysimachia davurica

Two new saponins, named davuricoside L (1) and davuricoside O (2), have been isolated from the whole plants of Lysimachia davurica. Their structures were determined by 1D and 2D NMR, FAB-MS techniques, and chemical methods.     

Flavonol glycosides from Lysimachia capillipes

Two new compounds, capilliposide I and capilliposide II, together with a known compound quercetin-3- O -(2,6-di- f - l -rhamnopyranosyl)- g - d -galactopyranoside were isolated from the extracts of the whole herbs of Lysimachia capillipes . Their structures were established through their spectral data and chemical properties.     

Steroidal saponins from Lysimachia Paridiformis

A new steroidal saponin, paridiformoside B (1), was obtained from the EtOH extract of the whole plant of Lysimachia Paridiformis Franch, togerher with one steroidal sapogenin (7) and seven known steroidal saponins (2-6, 8-9). Their structures were elucidated using extensive spectroscopic techniques including 1D and 2D NMR spectra.     

Steroidal saponins from Lysimachia Paridiformis

A new steroidal saponin, paridiformoside B (1), was obtained from the EtOH extract of the whole plant of Lysimachia Paridiformis Franch, togerher with one steroidal sapogenin (7) and seven known steroidal saponins (2-6, 8-9). Their structures were elucidated using extensive spectroscopic techniques including 1D and 2D NMR spectra.     

Two new triterpenoid saponins from the flowers and buds of Lonicera japonica

Two new triterpenoid saponins, loniceroside D (1) and loniceroside E (2), were isolated from the dry flowers and buds of Lonicera japonica Thunb., along with seven known compounds, chlorogenic acid (3), sweroside (4), vogeloside (5), epi-vogeloside (6), loniceroside A (7), loniceroside B (8), and loniceroside C (9). Their structures were elucidated on the basis of spectroscopic data, physicochemical properties, and acid hydrolysis.     

Triterpene saponins from Lysimachia christinae

Seven triterpene saponins were isolated from Lysimachia christinae and identified as lysichriside A (1), lysichriside B (2), primulanin (3), lysikokianoside 1 (4), anagallisin C (5), ardisiacrispin A (6), and ardisicrenoside B (7). Compounds 1 and 2 are new triterpene saponins, compounds 3, 5, and 7 were isolated from this genus, and compounds 4 and 6 were isolated from this species for the first time. Their structures were elucidated by means of 1D and 2D NMR experiments.